window.onload = checkCompatibility;
	
		function checkCompatibility()
		{
			
			if((BrowserDetect.browser=='Explorer'&&BrowserDetect.version<7)||(BrowserDetect.browser=='Safari'&&BrowserDetect.version<2))
			{

			var h = document.getElementsByTagName('html');
			h[0].style.overflow="hidden";
		var b = document.getElementById('page');

		var elem = '<div id="compatibility_cloak"></div><div id="compatibility_warning"><h2>Whoa, whoa. OK, intervention time.</h2><p>So I dig that you are into the whole retro browser thing, but you may be rocking it a little <em>too</em> old school. Why not try out something a little 21st century.</p></div>'
		
		var eDIV = document.createElement("div");
		eDIV.setAttribute("id","compatibility_warning");
		
		var eH2 = document.createElement("h2");
		eH2.appendChild(document.createTextNode("Whoa, whoa. OK, intervention time."));
		eDIV.appendChild(eH2);
		var eP = document.createElement("p");
		eP.appendChild(document.createTextNode("So I dig that you are into the whole retro browser thing, but you may be rocking it a little too old school. Why not try out something a little 21st century."));
		eDIV.appendChild(eP);
		
		
		var eA = document.createElement("a");
		eA.setAttribute('href', 'http://www.getfirefox.com');
		eA.appendChild(document.createTextNode("Upgrade now"));
		eDIV.appendChild(eA);
		
		b.appendChild(eDIV);
		
		
		eDIV = document.createElement("div");
		eDIV.setAttribute("id","compatibility_cloak");
		
		
		var yWithScroll = window.innerHeight + window.scrollMaxY;
		var xWithScroll = window.innerWidth + window.scrollMaxX;
		
		if (window.innerHeight && window.scrollMaxY) {// Firefox
		yWithScroll = window.innerHeight + window.scrollMaxY;
		xWithScroll = window.innerWidth + window.scrollMaxX;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		yWithScroll = document.body.scrollHeight;
		xWithScroll = document.body.scrollWidth;
	} else { // works in Explorer 6 Strict, Mozilla (not FF) and Safari
		yWithScroll = document.body.offsetHeight;
		xWithScroll = document.body.offsetWidth;
  	}

		
		
		
		var htmlheight = document.body.parentNode.scrollHeight;  
		htmlHeight=document.body.parentNode.clientHeight;
		htmlHeight = (document.height !== undefined) ? document.height : document.body.offsetHeight;
 
eDIV.style.height = yWithScroll + "px";
		
		b.appendChild(eDIV);
		}
		}
		
		
		
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{
			string: navigator.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari",
			versionSearch: "Version"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();
